Which of the following is a single replacement reaction?

Question

anonymous · Answer

CaO + H2O yields Ca(OH)2
 Mg + 2HNO3 yields Mg(NO3)2 + H2
 NaOH + HCl yields H2O + NaCl
 CH4 + 2O2 yields CO2 + 2H2O

anonymous · Answer

@Kainui

kainui · Answer

What do you think the right answer is? Single replacement sounds like it means that one thing is being replaced, right?

anonymous · Answer

I think it is either A or B, is that correct?

anonymous · Answer

@Kainui is it?

sweetburger · Answer

a synthesis reaction usually has 2 or more reactants and 1 product which eliminates a few of these

kainui · Answer

Wriddler you are on the right path, however the difference between these two reactions is one is called a single replacement while the other is called a synthesis. The difference is that in a synthesis you have two things coming together to form one thing while in a replacement you have two things to begin with and two things in the end, however one of the molecules has replaced partners.

sweetburger · Answer

yes

anonymous · Answer

Awesome, thanks!